Right after finishing university, Lee Bomi scores herself a job as a scientist at Red Force Technologies, but she soon learns that the renowned company is not what it makes itself out to be. Her boss hides a dark secret, having created something unimaginable—human clones. One of them takes an unhealthy interest in her, and she finds herself tangled up in a dangerous game of cat and mouse between him and the company.    

It all starts when they finally come face to face with their other halves. Directives to kill get thrown out the window, lost powers somehow get regained, and both sides quickly realize that they may just have to team up together if they all want to be set free.

Someday it'll all be over. The world will be peaceful, old friends will be found, and happiness will spread. For now, they seek comfort in the warmth the other provides.

After a spell goes out of control, Minji finds herself bound to the attractive yet obnoxious demon Baëkhyun. At first, she can’t wait to get rid of him, but fate has other plans. When they are confronted with a serious threat to their lives, they need to depend on each other to survive while coming to terms with their budding feelings for each other.  

They've been separated for a long time now, but Irene will continue to wait for him, just as he did for her. A sign of their perennial love.

Since she was diagnosed with a terminal illness, Hana doesn’t have much to live for. When she unwillingly catches the attention of the flirtatious demon Kāi, he makes it his goal to steal her heart within thirty days. What starts as a funny game to him soon gets serious when they begin to fall for each other. However, Hana’s life is fading fast...      

Minji nearly dies in a car accident and ends up with a new guardian angel who hopefully does a better job than her last.